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<td ><a href="../qtdoc/index.html">Qt 5.12</a></td><td ><a href="qtquick-index.html">Qt Quick 模块</a></td><td ><a href="qtquick-qmlmodule.html">QML类型</a></td><td >StateGroup QML 类型</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right"><a href="qtquick-index.html">Qt 5.12.3 参考指南</a></td>
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<h3><a name="toc">目录</a></h3>
<ul>
<li class="level1"><a href="#properties">属性</a></li>
<li class="level1"><a href="#details">详细信息</a></li>
</ul>
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<h1 class="title">StateGroup QML 类型</h1>
<span class="subtitle"></span>
<!-- $$$StateGroup-brief -->
<p>Provides built-in state support for non-Item types. <a href="#details">更多...</a></p>
<!-- @@@StateGroup -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> 导入语句：</td><td class="memItemRight bottomAlign"> import QtQuick 2.12</td></tr></table></div><ul>
<li><a href="qml-qtquick-stategroup-members.html">所有成员的列表，包括继承成员</a></li>
</ul>
<a name="properties"></a>
<h2 id="properties">属性</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtquick-stategroup.html#state-prop">state</a></b></b> : string</li>
<li class="fn"><b><b><a href="qml-qtquick-stategroup.html#states-prop">states</a></b></b> : list&lt;State&gt;</li>
<li class="fn"><b><b><a href="qml-qtquick-stategroup.html#transitions-prop">transitions</a></b></b> : list&lt;Transition&gt;</li>
</ul>
<!-- $$$StateGroup-description -->
<a name="details"></a>
<h2 id="details">详细信息</h2>
<p>Item (and all derived types) provides built in support for states and transitions via its <a href="qml-qtquick-item.html#state-prop">state</a>, <a href="qml-qtquick-item.html#states-prop">states</a> and <a href="qml-qtquick-item.html#transitions-prop">transitions</a> properties. <a href="qml-qtquick-stategroup.html">StateGroup</a> provides an easy way to use this support in other (non-Item-derived) types.</p>
<pre class="qml">

  <span class="type">MyCustomObject</span> {
      <span class="type"><a href="qml-qtquick-stategroup.html">StateGroup</a></span> {
          <span class="name">id</span>: <span class="name">myStateGroup</span>
          <span class="name">states</span>: <span class="name">State</span> {
              <span class="name">name</span>: <span class="string">&quot;state1&quot;</span>
              <span class="comment">// ...</span>
          }
          <span class="name">transitions</span>: <span class="name">Transition</span> {
              <span class="comment">// ...</span>
          }
      }

      <span class="name">onSomethingHappened</span>: <span class="name">myStateGroup</span>.<span class="name">state</span> <span class="operator">=</span> <span class="string">&quot;state1&quot;</span>;
  }

</pre>
<p><b>请参考</b> <a href="qtquick-statesanimations-states.html">Qt Quick States</a>，<a href="qtquick-statesanimations-animations.html">Transitions</a> 和 <a href="../qtqml/qtqml-index.html">Qt QML</a>。</p>
<!-- @@@StateGroup -->
<h2>属性文档</h2>
<!-- $$$state -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="state-prop">
<td class="tblQmlPropNode"><p>
<a name="state-prop"></a><span class="name">state</span> : <span class="type"><a href="../qtqml/qml-string.html">string</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the name of the current state of the state group.</p>
<p>This property is often used in scripts to change between states. For example:</p>
<pre class="js">

  <span class="keyword">function</span> <span class="name">toggle</span>() {
      <span class="keyword">if</span> (<span class="name">button</span>.<span class="name">state</span> <span class="operator">==</span> <span class="string">'On'</span>)
          <span class="name">button</span>.<span class="name">state</span> <span class="operator">=</span> <span class="string">'Off'</span>;
      <span class="keyword">else</span>
          <span class="name">button</span>.<span class="name">state</span> <span class="operator">=</span> <span class="string">'On'</span>;
  }

</pre>
<p>If the state group is in its base state (i.e&#x2e; no explicit state has been set), <code>state</code> will be a blank string. Likewise, you can return a state group to its base state by setting its current state to <code>''</code>.</p>
<p><b>请参考 </b><a href="qtquick-statesanimations-states.html">Qt Quick States</a>。</p>
</div></div><!-- @@@state -->
<br/>
<!-- $$$states -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="states-prop">
<td class="tblQmlPropNode"><p>
<a name="states-prop"></a><span class="name">states</span> : <span class="type"><a href="../qtqml/qml-list.html">list</a></span>&lt;<span class="type"><a href="qml-qtquick-state.html">State</a></span>&gt;</p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds a list of states defined by the state group.</p>
<pre class="qml">

  <span class="type"><a href="qml-qtquick-stategroup.html">StateGroup</a></span> {
      <span class="name">states</span>: [
          <span class="type"><a href="qml-qtquick-state.html">State</a></span> {
              <span class="comment">// State definition...</span>
          },
          <span class="type"><a href="qml-qtquick-state.html">State</a></span> {
              <span class="comment">// ...</span>
          }
          <span class="comment">// Other states...</span>
      ]
  }

</pre>
<p><b>请参考 </b><a href="qtquick-statesanimations-states.html">Qt Quick States</a>。</p>
</div></div><!-- @@@states -->
<br/>
<!-- $$$transitions -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="transitions-prop">
<td class="tblQmlPropNode"><p>
<a name="transitions-prop"></a><span class="name">transitions</span> : <span class="type"><a href="../qtqml/qml-list.html">list</a></span>&lt;<span class="type"><a href="qml-qtquick-transition.html">Transition</a></span>&gt;</p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds a list of transitions defined by the state group.</p>
<pre class="qml">

  <span class="type"><a href="qml-qtquick-stategroup.html">StateGroup</a></span> {
      <span class="name">transitions</span>: [
          <span class="type"><a href="qml-qtquick-transition.html">Transition</a></span> {
            <span class="comment">// ...</span>
          },
          <span class="type"><a href="qml-qtquick-transition.html">Transition</a></span> {
            <span class="comment">// ...</span>
          }
          <span class="comment">// ...</span>
      ]
  }

</pre>
<p><b>请参考 </b><a href="qtquick-statesanimations-animations.html">Transitions</a>。</p>
</div></div><!-- @@@transitions -->
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